# Mean

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Mean

The mean, also called the arithmetic mean or the average, is simply the sum of all the data points divided by the number of points. It is denoted with . The formula for the mean is:

- # hours worked

4 | 6 | 2 | 8 | 5 |

- easy to calculate
- only one exists for any data set
- affected by all observations, and therefore strongly affected by outliers
- used in many statistics calculations